Corner shelf



FIG. 1 is a rear perspective view of a corner shelf showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is an end elevation thereof, both ends appearing the same;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a front perspective view thereof.

The broken line showing of portions of the wall is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a corner shelf, as shown and described. 